Journal of Computer Science

Robust Image Watermarking Using Discrete Wavelet Transform

Dhandapani Samiappan and Krishnan Ammasi

DOI : 10.3844/jcssp.2011.1.5

Journal of Computer Science

Volume 7, Issue 1

Pages 1-5

Abstract

Problem statement: Digital Watermarking have gained popularity in recent years as a
means of protecting multimedia data from illegal copying and unlawful reproduction. It is mainly used
for copyright protection of multimedia data. Approach: In this study an image watermarking
algorithm which is blind (do not require the presence of host image for detection) and robust is
proposed. Results: The proposed watermarking scheme embeds the watermark in the Discrete Wavelet
Transform (DWT) domain. The watermark is a binary logo and is embedded in the subband of the
wavelet decomposition. Conclusion: This watermarking scheme is robust to several attacks like JPEG
compression, rotation, Gaussian filtering, median filtering, cropping, scaling, sharpening, Gaussian
noise and salt and pepper noise.